Have a slide imager (PCR II Plus) powered by a Condor GPC55C quad output smps. Worked well till I inadvertendly turned it off - on in a rapid sequence. The manual strongly warns against doing so. The switcher is dead. Put a healthy smps (identical model) from another machine to make the imager work again. To track I measured the output voltage of both, the failed and the healthy one, off machine. Strangely I get no voltage on both. Maybe the voltage is not present under no load? The good smps still works. How can I track the faulty part? Only part looking unhealthy is the feed back dip6 optocoupler: its leads and around the part covered with some greyisch powder. Could it be the culprit? The electrolytics are not bulged. The transistors look normal. Unsoldering the mosfets would be tricky. Couldn't find any schematics for this obsolete smps. Even the smps itself seems a rarity.
Any suggsetion would be appreciated.
Any suggsetion would be appreciated.